Quick answers
- Is CVE-2026-85442 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-85442 being exploited in the wild.
- How severe is CVE-2026-85442?
- High severity, with a CVSS score of 7.5, published 3 September 2026.
- Which products and versions are affected?
- MOOS Core-Moos through 10.4.0.
- Is there a fix for CVE-2026-85442?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-85442 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-85442?
- Check whether you run MOOS Core-Moos at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is an unvalidated packet length allocation issue in the CMOOSCommPkt::OnBytesWritten() function. The code allocates memory based on a declared length field in incoming wire packets without proper validation of the claimed size, leading to unbounded buffer allocation. An unauthenticated attacker on the network can send specially crafted packets with arbitrarily large declared lengths to exhaust the server's available memory. This denial-of-service attack succeeds before client authentication completes, requiring no authentication or special privileges. The issue affects MOOS core-moos through version 10.4.0.
Affected products
- MOOS core-moos through 10.4.0
Timeline
- 2026-09-03: disclosed